OPTICAL SYSTEM AND IMAGING APPARATUS

• Main Authors: YASUDA TOSHIYUKI, OKADA RYOTARO
• Format: Patent
• Language: English; Japanese
• Published: 07.06.2023
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

To reduce a ghost and a flare.SOLUTION: An optical system 10 includes a first optical part 13 and a second optical part 14. The first optical part 13 includes at least one first groove g1 which is extended along an optical axis ox around the optical axis ox on a first boundary. The first groove g1 attenuates reflection light with respect to incident light. The second optical part 14 includes at least one second groove g2 which is extended along the optical axis ox around the optical axis ox on a second boundary. The second groove g2 attenuates the reflection light with respect to the incident light. When viewed along the optical axis ox from the side of the first optical part 13, at least a part of the first groove g1 is covered on the side closer to the second optical part 14 than the first optical part 13.SELECTED DRAWING: Figure 2 【課題】ゴースト・フレアを低減する。【解決手段】光学系１０は第１の光学部分１３と第２の光学部分１４とを有する。第１の光学部分１３は第１の境界に光軸ｏｘの周囲に光軸ｏｘに沿って延在する少なくとも１つの第１の溝ｇ１を有する。第１の溝ｇ１は入射光に対して反射光を減衰させる。第２の光学部分１４は第２の境界に光軸ｏｘの周囲に光軸ｏｘに沿って延在する少なくとも１つの第２の溝ｇ２を有する。第２の溝ｇ２は入射光に対して反射光を減衰させる。第１の光学部分１３側から光軸ｏｘに沿って見ると、第１の光学部分１３より第２の光学部分１４側において第１の溝ｇ１の少なくとも一部が覆われる。【選択図】図２